Warning....
Do not buy V-Power Racing from the Shell servo at the Wanniassa shops. i recently decided to switch fuels and try the new V-Power Racing blend which is meant to be atleast 100 octane and contains 5% ethanol. worked fine for the first 2 tanks, but on the 3rd, all of a sudden my car feels like its dropped a cylinder!!! fearing the worst, i pulled the ignition apart and replaced the spark plugs to find that this did the trick and the car worked fine. shortly after, it started to miss again, so i swapped my coilpacks thinking they were getting to hot and shorting out. not this.... so i decided to clean the plugs and see if that worked. and it did. just now after a test drive, its started to miss again, which almost certainly means that it has to be the fuel.
now im not sure if its just a bad batch or if the extra octane and ethanol are the cause of it, but its seems that the fuel is burning too hot and is fouling the plugs, causing the problem. im putting it down to a bad batch of fuel, as it didn't foul the plugs in the either of the first 2 tanks. however, im not 100% certain of this fact, so im switching back to the good old trustworthy 98 octance stuff....
hope this post saves you from grief....
Cheers